EP3382101B1 - Cleaning device and corresponding cleaning method - Google Patents

Description

The invention relates to a cleaning device for a subsurface and to a cleaning method for a subsurface, it being possible in particular to clean even subsurfaces with non-closed surfaces, such as artificial turf.

From the DE 102010011418 A1 a method is known with which a substrate such as artificial turf can be cleaned. A nozzle tube with several individual nozzles is provided, which form a liquid curtain by spray jets lying next to one another. This hits the ground at an adjustable angle in a strip-like or line-like impact area. The angle can be in a range from 15 ° to 30 °. Dirt particles carried along by the spray jets are thrown or rinsed onto a receiving ramp arranged just behind the impact area, that is to say moved, and can be easily removed from there. The disadvantage here is that the removal of dirt particles after the receiving ramp can be difficult under certain circumstances.

From the AT 340 992 B a cleaning device is known with which, for example, traffic areas, that is to say smooth streets, can be cleaned. The cleaning device has a multiplicity of individual nozzles which generate individual spray jets lying next to one another. The individual nozzles are arranged along two opposite lines in such a way that they spray onto the surface to be cleaned in a narrow strip at approximately the same angle. A suction device with an elongated suction slot is provided above this strip, which sucks up water spraying upwards together with the impurities that are carried along. Three individual nozzles are shown here on each side, each of which is fed via a hose line from a pressurized water distributor.

From the DE 41 28 879 A1 a cleaning device is known in the form of a sweeper for cleaning road surfaces. Here, without the use of spray jets or nozzles, dirt and impurities are sucked from the road surface by means of a suction device which has an elongated suction mouth that runs transversely to the direction of travel.

From the US 7290307B1 a cleaning device for pavement or asphalt is known, which is used to apply water to clean the pavement or the failure a transverse to the direction of travel having extending nozzle tube. The horizontally running nozzle tube is centrally supplied with water and has several downwardly directed nozzles on an underside for discharging the water.

TASK AND SOLUTION

The invention is based on the object of creating a cleaning device as mentioned above and a corresponding cleaning method for substrates with which problems of the prior art can be solved and in particular it is possible to remove dirt particles detached or entrained from the substrate as simply and completely as possible to be able to remove.

This object is achieved by a cleaning device with the features of claim 1 and by a method for cleaning a substrate with such a cleaning device with the features of claim 14. Advantageous and preferred embodiments of the invention are the subject of the further claims and are explained in more detail below. Some of the features are only described for the cleaning device or only the method for cleaning. However, they should be able to apply independently of one another and independently both to a cleaning device and to a method for cleaning. The wording of the claims is made part of the content of the description by express reference.

The cleaning device, which can be used to clean flat surfaces with non-closed surfaces, such as artificial turf, has two nozzle tubes, each of which has several individual nozzles for generating jets of spray lying next to one another per nozzle tube. Under certain circumstances, these individual nozzles can form a curtain of liquid. The spray jets of the two nozzle pipes strike the ground from different or opposite directions in a common area of impact, it being possible for the directions to be opposite when viewed from above. Such an impact area is advantageously strip-shaped or linear. The spray jets can hit one another directly. Alternatively, they can hit the ground with a maximum distance of 5 cm or a maximum of 3 cm from each other. A suction device is arranged above the area of impact in order to be able to remove or suck up liquid splashing upwards and, above all, to remove or suck off dirt particles or impurities that are detached and carried away by the spray jets from the ground or from the ground. These dirt particles or impurities can also, so to speak, splash upwards, advantageously to a height of 3 cm or more above the ground. There they can then be easily picked up or sucked off by the suction device arranged above.

According to the invention, the suction device has an elongated suction slot which is advantageously approximately as long as the area of impact. The suction slot can be adjustable in height relative to the impact area. Additionally or alternatively, the width of the suction slit can be adjusted. The first measure of height adjustment can influence how many dirt particles or impurities or upwardly splashing liquid are sucked off. The second measure of setting the width of the suction slit can essentially set the speed of the air at the suction, which ultimately also influences the suction performance for liquid and dirt particles or impurities. The height and / or width of the suction slot can, if necessary, also be set or adapted during a cleaning process, for example to changing factors such as the nature of the subsurface or the amount of dirt particles.

In an embodiment of the invention, it is possible that the height and width of the suction slot can be adjusted simultaneously and / or synchronously. This makes an adjustment process easier with regard to finding an optimal value, possibly also with regard to the mechanical complexity for such an adjustability. Such adjustability can be implemented in such a way that the suction slot automatically becomes wider when it is moved upwards, and when it moves upwards Downward movement automatically becomes narrower. When the suction slot moves downwards, it comes closer to the area of impact, so that dirt particles loosened by the spray jets or carried upwards cannot spray far to the side, so that they can also be captured by a relatively narrow suction slot. In addition, with a narrow suction slit the flow velocity close to the suction slit is considerably higher, so that this in turn means that the dirt particles can be sucked in more strongly towards the narrow suction slit and then sucked off through it and thus removed.

The suction slot advantageously runs over the area of impact or exactly above it, that is to say vertically above it. This also applies in particular to a line-like or line-like impingement area, which can particularly advantageously lie exactly in the middle between the two nozzle tubes.

In the case of the invention, the suction slot is essentially formed by the lower edges of two opposing suction cheeks, which can be, so to speak, elongated surface components running parallel to the nozzle pipes. According to the invention, the suction cheeks can be moved and shifted linearly in such a way, in particular with a vertical component, that both suction cheeks can be moved towards a common line that runs parallel to their lower edge and parallel to the ground. The suction cheeks can be moved towards or away from it on this common line. It is possible for the suction cheeks to be displaceable at the same time and in the same way, so that, for example, only a single actuator is necessary and, in particular, problems with synchronization can also be avoided. Although this common line can also lie below the area of impact of the spray jets, it is advantageously above it. This makes it possible to actually make the suction slit very narrow, for example with a width of less than 1 cm or even only 5 mm, the suction slit still being above the impact area and thus actually bringing dirt particles or impurities upwards can from the underground.

In a further embodiment of the invention, it is possible that the lower ends of the suction cheeks are specially designed. It is thus possible for the outer edges pointing or directed away from the suction slot to be rounded. Such a rounding can be wide or generous, possibly with a radius of 50% to 100% of the thickness of the suction cheek at this lower end. Due to this wide curve, you can, so to speak, from the side The incoming air can flow around the lower end of the suction cheek very well and without any turbulence, i.e. as quickly as possible, and thus also pull the air upwards above the impact area at high speed and thus with good suction performance and thus also suck up dirt particles carried along upwards as well as possible. An inner edge of the lower ends of the suction cheeks that directly forms the suction slot can have no rounding or only a slight rounding. This shape is less important for the suction effect.

In yet another embodiment of the invention, it is possible for the aforementioned suction cheeks to be arranged on opposite sides of a suction box that is open at the bottom. These outer sides can diverge from bottom to top and thus be inclined in such a way that this inclination causes the movement path of the suction cheeks towards one another when moving downward or away from one another when moving upward. The inclination can in particular be mirror-symmetrical to a vertical. This is particularly advantageous if the arrangement of the nozzle pipes is also the same with regard to the distance to this vertical and the height above the ground. Linear guides or the like can be used for the suction cheeks. be provided on the outside of the suction box, on which they can be moved up or down. In a simple embodiment, these can be elongated slots in the suction cheeks into which guide pins or guide projections protrude, which protrude from the outside of the suction box. The elongated slots are formed or define exactly along the desired direction of movement. It is possible to swap the arrangement of longitudinal slots in the suction cheeks and guide projections on the outside of the suction box.

The outsides of the suction box do not necessarily have to form the insides of a suction channel or suction chamber of the suction box at the same time. Rather, they advantageously form a structural unit or a structural unit with these inner sides, so that separate components can also be provided for the formation of the inner sides.

The suction box can have several suction connections at the top or on an upper side. These can be led by means of one or more pipelines to a suction device, as is known per se for such cleaning devices. Dirt particles and liquid can also be separated on such a suction device, so that in particular the liquid can also be used again later or directly for the cleaning process. The dirt particles are advantageously collected in a separate store. The Suction connections preferably go upwards from the suction box, whereby they can then also be angled relatively shortly behind them and possibly also be brought together so that a total of only one or two suction pipelines lead to the suction device itself.

In a further embodiment, it is possible for subdivisions to be provided in an aforementioned suction box in such a way that they lead or extend from one inside wall of the suction box to another opposite inside wall. You can subdivide the suction box several times in its longitudinal direction, that is, along the suction slit or along the area where the spray jets hit, into suction areas. These subdivisions run not only from one inner side to the opposite, but also from top to bottom and in particular to an upper side of the interior of the suction box. A reduction in the cross section in the direction of the suction device can thus be improved. This interior can be designed in such a way that the subdivisions become strictly monotonically narrower or reduce their width from bottom to top. This means that the inner sides of the suction box may even be inclined in the opposite direction to the respective aforementioned outer sides with the suction cheeks on them. This has the advantage that by reducing the cross section overall towards a suction connection on the upper side, the flow speed increases and thus liquid and dirt particles can be reliably sucked off and thus transported away. While the speed of the dirt particles is high in the lower area of the suction box, i.e. at the suction slot or, under certain circumstances, below it due to the detachment by the spray jets hitting the ground, it naturally or necessarily decreases on the way up, in particular even after the cross-section above the narrow suction slit can widen again a little. A renewed acceleration upwards is therefore an advantage. It can be provided that a suction connection is provided on the upper side of the suction box between two named subdivisions that are adjacent. In an advantageous embodiment of the invention, these can be three to six or even eight suction connections on the top, wherein suction areas below these suction connections, which are adjacent to one another, can be separated from one another by the partitions.

In a further embodiment, it is possible for the nozzle pipes to be adjustable in their height above the ground and / or in their distance from one another. This can be achieved by any guides or holders for the nozzle pipes. Particularly beneficial this is achieved through guide slots for the nozzle pipes in side cheeks or side plates, which are arranged at the beginning and at the end of the suction slot or the suction box. By adjusting the height of the nozzle pipes above the subsurface and / or their distance from one another, it is possible to adapt to different subsurfaces, in particular with different degrees of contamination or different dirt particles therein.

In a further preferred embodiment of the invention, it is possible that the nozzle pipes have an adjustable angle of the spray jets to the substrate to be cleaned. For this purpose, the nozzle tubes can be rotated, for example, about a central longitudinal axis, so that the angle for all of its spray jets changes at the same time for each nozzle tube. Alternatively, as described above, the nozzle pipes can be moved in a guide or a guide slot in such a way that the alignment and thus the angle of the spray jets to the ground change. If the angle becomes larger, the spray jets can penetrate deeper into the subsurface and thus also transport deeper-lying impurities or dirt particles upwards or tear them upwards in such a way that they can be sucked off. At the same time, the risk can increase that, for example, in the case of an artificial turf filled with sand or granulate as the substrate, too much of the filling is carried upwards and sucked off and thus removed from the substrate, which would obviously be disadvantageous. In addition to a flatter angle of incidence, this effect can of course also be counteracted by slightly reducing the pressure of the spray jets.

In a further embodiment of the invention, a guide device for the nozzle pipes can be designed in such a way that the nozzle pipes are adjusted in the same way and in opposite directions. They are advantageously adjusted in such a way that they are always arranged mirror-symmetrically to a vertical center plane which runs through the area of impact. Furthermore, the nozzle pipes with their nozzles therein, in particular flat jet nozzles, can also always be arranged and aligned with mirror symmetry to this central plane.

In a further possible embodiment, the guide device for the nozzle tubes can have a vertically displaceable guide carriage, advantageously on both sides of the nozzle tubes. Furthermore, the guide device can have a holding rod which runs from the guide carriage to each nozzle tube and advantageously has a connection to the nozzle tube which is in its extension. At a distance from this, the guide device can have an adjusting rod that also extends from the guide carriage to each nozzle tube runs, however, advantageously by means of a link lever or the like. is connected to the nozzle tube, this connection not being in the extension of the nozzle tube. The holding rod and the adjusting rod can run parallel to one another, that is, they can form a kind of parallel guide for the nozzle pipes and their movement. A pivot lever should be non-rotatably connected to the nozzle tube and ensure that it is adjusted or rotated in such a way that the angle of impact behaves as desired when it moves, advantageously not changing.

The guide device and thus also the holding rod and adjusting rod are advantageously designed in such a way that when the guide carriage is adjusted and the position of the nozzle pipes changes, an angle of impact of their spray jets on the ground always remains the same and does not change. In this way it can be achieved that cleaning and thus also a cleaning result can be optimized by changing the position of the nozzle tubes. It is particularly advantageously provided that the two nozzle tubes move simultaneously and in the same way, that is to say always run symmetrically to a vertical center plane. At the same time, however, it should be noted that the spray jets are influenced by the height and width of the suction slit and, if applicable, by pressure on the nozzle pipes. The guide carriage can be adjusted and the nozzle pipes can change their position, but advantageously in such a way that the angle of incidence remains the same.

Alternatively, an angle of incidence of the spray jets can also differ from one another in the case of the two nozzle tubes, and under certain circumstances it can also be adjustable. In this way, an adaptation to different substrates or their degree of contamination can be achieved.

In a further embodiment of the invention, it is possible for the nozzle tubes to have flat jet nozzles, particularly preferably 5 to 15 flat jet nozzles. The spray jets are flat jets that essentially lie in one plane. A flat jet can, so to speak, be fan-shaped or fanned out. The flat jets form a liquid curtain per nozzle tube, which jets into the area of impact. Due to the particularly advantageous symmetrical irradiation of the spray jets on or into the substrate, the dirt particles are not only thrown slightly upwards or slightly diagonally upwards in the direction away from the corresponding nozzle pipe, but also mainly upwards or even vertically upwards, so to speak. In a relatively narrow area above the impact area, they reach a sufficient height above the ground, for example at least 3 cm, from which they can then be extracted very effectively by means of the suction slot described above.

The individual flat jet nozzles can be designed to be adjustable, for example with regard to the cross section or width of the respective spray jet. A profile can be set in this way. The spray jets each formed by them from the two different directions can be symmetrical to a vertical plane along the impact area, preferably at the same angle to the ground.

In a further development of the invention, a treatment device can be provided for treating the surface with liquid by applying this liquid. For example, a care liquid can be applied, advantageously a disinfectant liquid, in order to disinfect the surface or an artificial turf pitch during or after cleaning. For this purpose, the treatment device has a tank and at least one discharge device with at least one discharge opening for the liquid and a line from the tank to the discharge device. The discharge device can advantageously be a tube, for example a type of spray bar, with several discharge openings on it, particularly advantageously in the form of nozzle openings. The discharge can take place with high pressure or with a slight overpressure, depending on the desired penetration depth. For this purpose, a pump or a similar device for generating pressure can be provided, for example on the tank or on the aforementioned line. The discharge device can preferably be arranged behind the suction device in the direction of travel of the cleaning device, in particular also behind the rear nozzle pipe. This prevents the liquid from being washed out again. It can be arranged on a chassis or frame that also carries the nozzle pipes.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine schematische Seitenansicht des Funktionsprinzips und des grundsätzlichen Aufbaus einer erfindungsgemäßen Reinigungsvorrichtung,

Fig. 2

eine Seitenansicht einer erfindungsgemäßen Reinigungsvorrichtung mit Chassis und Führungsvorrichtung für die Düsenrohre,

Fig. 3

eine Schrägansicht von oben auf die Reinigungsvorrichtung aus Fig. 2,

Fig. 4

eine vergrößerte Seitenansicht der Reinigungsvorrichtung aus Fig. 2 mit etwas verstellter Führungsvorrichtung,

Fig. 5

eine Ansicht von schräg unten auf einen Absaugkasten mit Absaugschlitz zur Absaugung,

Fig. 6

eine schräge Schnittdarstellung durch die Reinigungsvorrichtung aus Fig. 2 und

Fig. 7

eine Schrägansicht auf einen Längsschnitt durch den Absaugkasten.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

Fig. 1

a schematic side view of the functional principle and the basic structure of a cleaning device according to the invention,

Fig. 2

a side view of a cleaning device according to the invention with chassis and guide device for the nozzle pipes,

Fig. 3

an oblique view from above of the cleaning device Fig. 2 ,

Fig. 4

an enlarged side view of the cleaning device Fig. 2 with a slightly misaligned guide device,

Fig. 5

a view from below at an angle of a suction box with a suction slot for suction,

Fig. 6

an oblique sectional view through the cleaning device Fig. 2 and

Fig. 7

an oblique view of a longitudinal section through the suction box.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In Fig. 1 a schematic side view of a suction device 21 of a cleaning device according to the invention is shown, on the basis of which the basic principle of the cleaning method according to the invention is explained. A cleaning device then shown as a whole in the other figures has two nozzle pipes 13a and 13b which are arranged at a distance from one another and have approximately the same height above a surface to be cleaned, here an artificial turf 11. This can be a few centimeters, for example 5 cm to 20 cm or even 30 cm. The nozzle tubes 13a and 13b each have flat jet nozzles 14a and 14b, which generate flat jets or fanned out flat spray jets 16a and 16b, which can form a type of flat liquid curtain. They are directed towards each other and obliquely downwards. The nozzle tubes 13a and 13b can each have five to thirty such flat jet nozzles 14a and 14b. The nozzle tubes 13a and 13b are advantageously designed identically and arranged symmetrically to one another. The angle α of the spray jets 16a and 16b to the horizontal or to the artificial catch 11 should be the same for both sides and can be, for example, 20 °, but generally lie in a range between 15 ° and 25 ° or even reach up to 30 °. Under certain circumstances, the angle α can also be adjusted or adjusted, as will be explained in more detail below. The angle α for the two spray jets 16a and 16b can be different, but it is advantageously the same.

The spray jets 16a and 16b meet in an impact area 18, which is shown in dashed lines and which runs approximately along a line parallel to the nozzle pipes 13 and to the artificial turf 11. The area of impact 18 can, depending on the height of the nozzle pipes 13 and the angle α of the spray jets 16, lie in the upper region of the artificial turf 11 or also in the lower region, that is to say where there is a filling common for artificial turf 11 in its lower region, formed from sand and / or granulate or the like. Thus, so to speak, the depth of penetration of the spray jets 16 into the artificial turf 11 can be adjusted and thus also a cleaning effect. The deeper the impact area 18 is, the deeper the spray jets 16 penetrate the artificial turf 11 and can remove more impurities or dirt particles, but also more of the backfill. Above the impact area 18, lines running upwards indicate how liquid and dirt particles 19 are thrown upwards. This is the effect of the spray jets 16, which usually spray with great pressure into the impact area 18. The upwardly thrown dirt particles 19 together with the water or the liquid can also form a kind of cloud that is not only, but mainly, thrown vertically upwards.

In order to remove these upwardly thrown dirt particles 19 together with the water, a suction device 21 is provided above the impact area 18, for which in particular the lower suction slot 22 is relevant or important for the function according to the invention. It can be seen that the suction slot 22 is arranged above and above the impact area 18 and thus the dirt particles 19. It is advantageously arranged vertically above it, that is, in a vertical line above it. The height of the suction slot 22 above the area of impact 18 or above the artificial turf 11 is adjustable and should advantageously be in a range of 2 cm to 10 cm or a maximum of 15 cm. It is important that the spray jets 16 can still spray unhindered into the impact area 18 and, at the same time, enough air can flow into the spacing area in order to carry away the dirt particles 19 thrown up and the sprayed water upwards and thus to be able to suck it off.

The width of the suction slot 22 is also advantageously adjustable. As a result, in addition to varying the suction power, the flow rate can be set in the vicinity and also directly at the suction slot 22, which has an effect on the suction effect.

In the suction device 21 shown here, inclined suction cheeks 24a and 24b are provided for this purpose, which are inclined at the same angle β to the ground or to the artificial turf 11. This angle is about 70 ° here, but can generally be in a range from 60 ° to 80 °. The suction cheeks 24 are arranged on the outer sides 28a and 28b of a suction box 27 in a manner which will be explained in more detail later. Are beneficial they can be moved simultaneously and in the same direction, as indicated by the arrows. If they are shifted downwards, the suction slot 22 is moved downwards, so to speak, that is closer to the impact area 18, but at the same time narrower due to the inclined position. When the suction cheeks 24a and 24b move upwards, the suction slot 22 moves away from the impact area 18 and becomes wider. In an alternative embodiment of the invention, these adjustment options for the width of the suction slot 22 and its height above the impact area 18 could also be designed to be separately adjustable. Then, however, the mechanical or structural effort and the control effort also increase. An optimal height and width of the suction slot 22 may also have to be set in the respective application, since this depends on the type of artificial turf 11 as well as the degree of its soiling and the desired degree of cleaning.

It can also be seen that the suction cheeks 24 are strongly rounded at the outer lower edges 25a and 25b, so that they have the outer shape of a quarter circle. As a result, sucked in air can flow better from the left and right outside next to the suction cheeks 24 and flow more quickly around the outer lower edges 25a and 25b, which improves the suction. The inner lower edges are here relatively sharp-edged, but can optionally also be rounded or specially adapted in some other way.

The suctioned mixture of dirt particles 19 and water can be removed from an interior 30 of the suction box 27 by means of suction connections 31 on its upper side and a suction 32, which can be designed in a manner known per se. The suction box 27 itself can have a height of 20 cm to 30 cm.

From the Fig. 1 It is easy to see that the possible small distance between the suction slot 22 and the area of impact 18 and thus the dirt particles 19 thrown upwards, including the water, can be suctioned off very well and largely or even completely. The distance can be a few centimeters, for example 3 cm to 15 cm. Adjustability is also very important.

On the right nozzle tube 13b it is shown by arrows that this can be adjusted in many ways, namely in the vertical direction, in the horizontal direction and also rotated, whereby the angle α of the spray jets 16 can be adjusted. The angle β for the suction cheeks 24 is always the same and predetermined structurally here.

In the Fig. 2 a cleaning device 35 according to the invention is shown overall in a side view. In practice, of course, it also has an outer cover and can be attached to a specially designed vehicle, in particular a truck, at the front. However, this is basically known from the prior art mentioned at the beginning and therefore does not need to be explained in more detail here.

The cleaning device 35 has a chassis 36 as a type of frame, at the corners of which four wheels 37 are rotatably arranged. The direction of travel or direction of movement of the cleaning device 35 during operation is from right to left on the artificial turf 11. Shortly behind the left front wheels 37 there is a downwardly protruding floor comb 38 with a plurality of resiliently mounted, downwardly pointing metal tips or metal wires . This is used to hold larger objects such as balls or the like. to push forward so that they do not interfere with the operation of the suction device 21. Furthermore, the artificial turf 11 can be combed through and loosened, so to speak, in particular also a backfill in the artificial turf 11 with the dirt particles on it and in it.

The suction device itself is not shown in detail here, only a suction connection 31 with suction 32 at the top in the manner of large pipes or hoses. Here, a guide device 40 for the nozzle pipes 13 is shown in detail. The guide device 40 has a vertically displaceable guide carriage 41 which can be moved along vertical guide rods 42, for example by means of a drive placed on top of the guide rods 42. This can be a spindle drive or some other drive. Manual adjustment is also possible. Two retaining levers 43a and 43b extend from the guide carriage 41 in an articulated manner obliquely downwards and outwards. At their lower ends they are connected to the nozzle pipes 13, specifically rotatable. Furthermore, adjusting levers 45a and 45b extend from the guide carriage 41, somewhat offset, parallel to the holding levers 43. They are rotatably connected to the ends of adjusting arms 46a and 46b, these adjusting arms 46a and 46b being non-rotatably connected to the nozzle pipes. The nozzle tubes themselves are slidably mounted in slotted guide slots 48a and 48b with a slight bend, which are provided in slotted guide plates 47a and 47b. These slide plates 47 are attached to the left and right sides of the chassis 36 or to a type of cover box or the like. The arched shape of the slide slots 48 determines a movement path of the nozzle tubes 13 when moving. If the guide carriage 41 is moved upwards, as can be seen, for example, by a comparison with the enlarged illustration in FIG Fig. 4 As can be seen, the holding levers 43 pull the nozzle pipes 13 upwards along the link slots 48. The nozzle pipes 13 move accordingly the path of the link slots 48. Due to the symmetrical structure of the guide device 40, this movement also takes place uniformly and in the same way.

The adjusting levers 45 ensure, through their articulation of the adjusting arms 46, an alignment of the spray jets of the nozzle tubes or rotate the nozzle tubes 13. Since the retaining levers 43 and the adjusting levers 45 are parallel to one another, the alignment of the nozzle tubes 13 and thus also their flat jet nozzles 14 or the spray jets 16 are always the same during the adjustment. Otherwise this would not be guaranteed. In an extension of the invention, it is basically also possible to adjust this angle for the spray jets, advantageously by either adjusting the adjusting levers 45, for example shortening or lengthening their length, or changing their articulation points on the guide carriage 41 or on the adjusting arms 46 become. This can be controlled by a motor, alternatively it can be done manually. In the preferred embodiment shown here, all levers are rigid and length-invariant, so that when the nozzle pipes 13 move, their angle α to the artificial turf 11 remains the same.

It is easy to imagine that the link slots 48 in the link plates 47 can also be configured differently. By exchanging these link plates 47 with other link slots, other paths of movement can also be provided for the nozzle pipes. Furthermore, it could also be provided that different link slots 48 are provided for each of the two nozzle pipes, so that the angles of their spray jets to the artificial turf are possibly no longer the same or no longer change in the same way.

In the Fig. 4 is at the top of the right chassis 36, a treatment device 56 for disinfection or the like. provided as previously explained. The treatment device 56 has a tank 58 at the top which contains the liquid for treatment or for disinfection. The liquid can be pumped from the tank 58 to a discharge device 64 by means of two lines 60a and 60b and a pump 62. Tank 58 and pump 62 can also be integrated as a structural unit. The discharge device 64 has a tube 65 with a plurality of discharge openings 66 on it, which can also be designed as a type of nozzle. However, no specific high pressure is required for the discharge of the liquid for treatment, in particular when it comes to a disinfectant liquid, except for the generation of a spray curtain 68 for better and more uniform distribution. Thus, after cleaning the artificial turf 11, disinfection can take place.

From the oblique view of the Fig. 3 is the external structure of the cleaning device 35 or the like except for a cover. good to see. The cleaning device 35 can be connected to a solid arm 50 by means of a coupling plate or the like provided at its right end, which is attached to an aforementioned truck or the like. can be attached. It can also be seen that four suction connections 31 are provided, two of which each merge to form a total of two tubes which lead to a suction 32. This suction is advantageously arranged on the aforementioned truck, which guides the entire cleaning device. It can also be seen that a previously described guide device 40 for the nozzle pipes 13 is provided on the left and right of the chassis 36.

In the Fig. 5 an enlarged oblique view of a suction box 27 of a suction device 21 is shown. The suction box 27 has inclined outer sides 28, see also the sectional view of FIG Fig. 6 . Inside the outer sides 28, the suction box 27 has two inner sides 29a and 29b, which are also slightly inclined and thus diverge slightly from bottom to top. Their angle to the horizontal is about 80 ° to 85 °. They are mainly intended to reduce the inner space 30 somewhat than it would be in accordance with the position of the outer sides 28. This serves to improve the effectiveness of the suction. The angle of the outer sides 28 is due to the desired adjustment path or movement path for the outer suction cheeks 24a and 24b.

From the longitudinal section of the Fig. 7 as well as the Fig. 6 it can be seen that the suction box 27 is divided into four areas in its interior 30 by means of inclined and angled partitions 54. These individual areas are in width according to the section of the Fig. 6 somewhat widened from bottom to top, but greatly shortened in length corresponding to the longitudinal axis of the suction box and run exactly towards the suction connections 31 on the upper side of the suction box 27. The four chambers formed by the subdivisions 54 are thus closed off from one another. Dirt particles 19 and liquid or water that are sucked up and thrown up are thus very effectively and very efficiently sucked off and moved towards the suction connections 31 and thus completely removed so that nothing falls back down through the suction slot 22 onto the substrate 11.

From the enlarged view of the Fig. 5 as well as from Fig. 6 it can be seen that guide slots 26 run in the suction cheeks 24. Guide screws 52a and 52b, which are fastened to the outer sides 28a and 28b, engage through these. They enable a defined Movement of the suction cheeks 24 along the outer sides 28 obliquely upwards or obliquely downwards. For this purpose, actuators or adjustment means (not shown) are advantageously provided. The suction cheeks 24 can be moved by an electric motor or manually. Their movement does not necessarily have to take place synchronously, but it should, whereby the two suction cheeks 24a and 24b are always at the same height or have the same distance from the ground, so that the suction slot 22 can be optimally formed.

From the oblique view of the Fig. 6 can also be seen how the spray jets 16a and 16b of the flat jet nozzles 14a and 14b of the nozzle tubes 13a and 13b each form largely closed liquid curtains that are relatively thin and in the same direction, but run closed in width over the working width of the cleaning device 35. They hit the artificial turf 11 in the area of impact 18, which is also indicated here. It can also be seen how the suction slot 22 is located above the area of impact 18 here.

The angle α or the height or general position of the nozzle pipes 13 can also be adjusted directly during the cleaning process for an artificial turf 11. However, an operator of the cleaning device advantageously carries out a few tests in order to test the nature of the surface or artificial turf 11 to be cleaned and how many dirt particles it has and how much and what type of backfill it contains. The operator can then make an adjustment under certain circumstances. However, during the cleaning process itself, that is to say while the cleaning device is moving and cleaning, it is hardly possible for the operator to check the cleaning result and therefore an adjustment is not particularly useful.

Claims (15)

1. Cleaning device (35) for a ground (11) with a non-closed surface like an artificial turf, for example, the cleaning device comprising:

   - a plurality of single nozzles (14), wherein the spray jets of the single nozzles (14) are oriented from opposite directions into a common impact zone (18) on the ground (11),

   - a suction device (21) above the impact zone (18) for suction extracting of liquid splashing upwards and dirt particles (19) entrained from the ground (11) or off the ground,
   wherein

   - the suction device (21) has an elongate suction slot (22) which is formed essentially by the lower edges (25) of two opposite suction frames (24),

   - the suction slot (22) is variable in height relative to the impact zone (21) and/or

   - the suction slot (22) has a variable width,
   characterized by two nozzle tubes (13) which are provided on the cleaning device,

   - wherein each of the plurality of single nozzles (14) are disposed on a respective nozzle tube (13) for generating juxtaposed spray jets (16) per nozzle tube,

   - wherein the suction frames (24) are capable of linear movement and displacement, respectively, such that both suction frames (24) are movable simultaneously towards a common line or away from said line, wherein said common line extends in parallel to the lower edge (25) of the two suction frames (24) and in parallel to the ground (11).
2. Cleaning device according to claim 1, characterized in that height and width of the suction slot (22) are adjustable simultaneously and/or synchronously, in particular such that the suction slot (22) during an upwards movement becomes wider and during a downwards movement becomes narrower.
3. Cleaning device according to claim 1or 2, characterized in that said common line is above the impact zone (21) of the spray jets (16).
4. Cleaning device according to any of the preceding claims, characterized in that, on a lower end of the suction frames (24), the outer edges facing away from the suction slot (22) are rounded, in particular with a radius of 50% to 100% of the thickness of the suction frame (24) on the lower end, wherein in particular the inner edge directly forming the suction slot (22) does not have a rounding or merely a small rounding.
5. Cleaning device according to any of the preceding claims, characterized by a suction box (27), wherein the suction frames (24) are disposed on opposite outer sides of the suction box (27) which is open at the bottom, wherein said outer sides are inclined flaring from bottom to top, in particular mirror symmetrical to the vertical, wherein the suction frames (24) are movable upwards and downwards by means of linear guidings on the outer sides of the suction box (27).
6. Cleaning device according to claim 5, characterized in that a plurality of suction connections (31) are provided on the top of the suction box (27) towards an extraction by suction.
7. Cleaning device according to claim 5 or 6, characterized in that subdivisions (54) are provided in the suction box (27), which subdivisions extend from one inner side wall of the suction box to another opposite inner side wall and provide multiple partitions of the suction box in the longitudinal direction thereof, wherein the subdivisions (54) extend from top to bottom and, thereby, two adjacent subdivisions approach each other and reduce their distance towards the top strictly monotonously, wherein preferably in the region of an upper side of the suction box (27) to which the adjacent subdivisions approach, a suction connection (31) is provided.
8. Cleaning device according to any of the preceding claims, characterized in that the nozzle tubes (13) are variable in their height above the ground (11) and/or in their mutual spacing.
9. Cleaning device according to any of the preceding claims, characterized in that the nozzle tubes (13) have an adjustable angle of the spray jets (16) in relation to the ground (11).
10. Cleaning device according to claim 8 or 9, characterized by a guiding device (40) for the nozzle tubes (13) which adjusts the nozzle tubes similarly and inversely such that they are always disposed and oriented mirror symmetrical to a vertical central plane across the impact zone (18).
11. Cleaning device according to claim 10, characterized in that the guiding device (40) includes a vertically displaceable guide carriage (41) having a holding rod (42) from the guide carriage to each nozzle tube (13) and spaced therefrom having an adjusting rod (45, 46) from the guide carriage (41) to each nozzle tube (13), wherein preferably the guiding device (40) is configured such that during adjusting of the guide carriage (41) and, consequently, changing the position of the nozzle tubes (13) an impact angle (α) of their spray jets (16) on the ground (11) is always constant and does not change.
12. Cleaning device according to any of the preceding claims, characterized in that the nozzle tubes (13) include flat jet nozzles (14), preferably 5 to 15 flat jet nozzles (14), and the spray jets (16) are flat jets (16) located in one plane, which jets form a liquid curtain per nozzle tube which sprays into the impact zone (18).
13. Cleaning device according to any of the preceding claims, characterized by a treatment device (56) for treating the surface (11) with liquid by applying the liquid, the treatment device (56) comprising:

    - a tank (58) for the liquid,

    - at least one discharge device (64) including at least one discharge opening (66) for the liquid,

    - a conduit (60) from the tank (58) to the discharge device (64),

    wherein preferably the discharge device (64) is disposed downstream of the suction device (21) in the direction of motion of the cleaning device (35), in particular also downstream of the rear nozzle tube (13).
14. Method for cleaning a ground (11) using a cleaning device (35) according to any of the preceding claims, characterized by the steps:

    - spraying the ground (11) with spray jets (16) from two different directions such that the two spray jets hit the ground in an impact zone (18),

    - removing of liquid splashing upwards and dirt particles (19) entrained from the ground (11) or off the ground using suction from above.
15. Method according to claim 14, characterized in that the spray jets (16) from two different directions are symmetrical to a vertical plane along the impact zone (18), preferably with the same angle (α) to the ground (11).

Images